feat(exprs): add cursors

exprs/niigo-miku-cursors.nix

@@ -0,0 +1,48 @@
+{
+  stdenvNoCC,
+  fetchzip,
+  win2xcur,
+}:
+stdenvNoCC.mkDerivation {
+  pname = "niigo-miku-cursors";
+  version = "0";
+
+  src = fetchzip {
+    url = "https://www.colorfulstage.com/upload_images/media/Download/cur%20file-static-N25.zip";
+    hash = "sha256-sx5sB1n5eQurZr+DsAFWKNblfGxHt5RBWluc2ChkYsM=";
+    stripRoot = false;
+  };
+
+  nativeBuildInputs = [ win2xcur ];
+
+  buildPhase = ''
+    mkdir output/
+    win2xcur *.{ani,cur} -o output
+
+    pushd output
+    mv Busy wait
+    mv Diagonal1 size_fdiag
+    mv Diagonal2 size_bdiag
+    mv Help help
+    mv Horizontal ew-resize
+    mv Link pointer
+    mv Move move
+    mv Normal default
+    mv Precision cross
+    mv Text text
+    mv Unavailable not-allowed
+    mv Vertical ns-resize
+    mv Working half-busy
+
+    bash ${./addmissing.sh}
+    popd
+  '';
+
+  installPhase = ''
+    mkdir -p "$out/share/icons/N25 Miku/cursors"
+    cp output/{*,.*} "$out/share/icons/N25 Miku/cursors"
+
+    echo -e "[Icon Theme]\nName=N25 Miku" > "$out/share/icons/N25 Miku/index.theme"
+    echo -e "[Icon Theme]\nInherits=N25 Miku" > "$out/share/icons/N25 Miku/cursor.theme"
+  '';
+}